const path = require('path');
const fs = require('fs');
const chalk = require('chalk');

const { Util } = require('../util/');

class LocaleLoader {

    constructor(client) {

        this.client = client;
        this.languages = {};
        
    }

    template(locale, index) {

        return this.languages[locale] ? this.languages[locale][index] : `Locale ${locale} does not exist.` || `Entry ${locale}:${index} does not exist.`;

    }

    async loadLanguages() {

        const _directory = path.join(process.cwd(), 'language/languages');
        const directories = fs.readdirSync(_directory); //locale directories, ex. en_us, fi
        
        for (const directory of directories) await this.loadLanguage(directory);

    }

    async loadLanguage(language) {

        this.client.logger.info(`Loading locale ${chalk.bold(language)}`);
        const directory = path.join(process.cwd(), `language/languages/${language}`);
        const files = Util.readdirRecursive(directory);

        let combined = {};
        for(let file of files) {
            file = fs.readFileSync(file, {
                encoding: 'utf8'
            });
            const result = this.loadFile(file);
            Object.assign(combined, result);
        }

        this.languages[language] = combined;

    }

    loadFile(file) {

        const lines = file.split('\n');
        const parsed = {};

        let matched = null;
        let text = '';
        for(const line of lines) {
            const matches = line.match(/\[([_A-Z0-9]{1,})]/, 'gi');
            if(matches) {
                if(matched) {
                    parsed[matched] = text;
                    matched = matches[1];
                    text = '';
                } else {
                    matched = matches[1];
                }
            } else {
                if(matched) {
                    text += line;
                } else {
                    continue;
                }
            }
        }

        if(matched) {
            parsed[matched] = text;
        }

        return parsed;

    }

}

module.exports = LocaleLoader;